Reenforced-covered-edge plaster board



Dec; 14,19%, k 1,610,817

J. SCHUMACHER REENFORCED COVERED .EDGE PLASTER BOARD Filed Nov. 9, 1925 l 'IN VEN TOR.

ATTORNEYS. l

5 BY JM 50k/Wahr Patented Dee. 14, 1926.

sr'rEs PATEN 'r OFFICE.

JOHN SCHUMACHER, 0F LOS ANGELES, CALIFORNIA..

:REENFOF'CED-COVERED-DGE BLASTER BOARD.

Application'alea November a, 1925. serial no. 67,912.

This invention relates to plaster board and especially means for reenforclng the edges thereof. Plaster board is subjected to comparatively rough usage during manufacture, transportation, and Edges thereof unless protected are liable to chipping, cracking and other damage which mars the board so that the production 0f smooth joins between panels becomes difli cult and even starts peeling of Vthe cover sheets from the plaster body.

The present invention relates to a plaster.

board panel constructed in iaccordance with j my invention.; Fig. 2 is a horizontal sectlon througha panel; and Fig. 3 is a transverse vertical section through a panel showing a fragment of an adjacent panel with the joints covered by paper tape.

Referring more particularly to the drawing, 5 indicates a core of cementitious material such asgypsum plaster, composition thereof. or like material Well known in the art. rlhe body has its faces covered by sheets of paper or the lkeindicated by 6 and 7. rFliese sheets are bound to the plaster body/fin a manner well known in the art. llt is the common practic to providesuch structures with exposed edges between the cover sheets. In the present construction, ll have covered these edges with strips of pa- 'per or like material indicated by \7. The strips 7 are corrugated transversely, as Abest shown in Fig. 2. Whereas I have s'hown`invdependent strips of edge covering material, it is obvious thatthe cover sheets may be made longer than the panel, corrugated or installation.

luted at the edges and turned over providing a corner. With the construction shown herein, the marginal edges of the face sheet may be bevelled as indicated by 8.

ln Fig. 3l have indicated adjacentpancls A of plaster board A and B. rlt`he marginal edges of theboard are bevelled so that the abutting panels have recesses atfthe. joints with sloping walls. rl`he crack betw'een the panels may be ^filled with plaster, putty or cement. The corrugated edge provides vvalleys extending transversely, in which the plaster cement may lodge and become anchored, therebyholding the panel against axial displacement. Bevelled paper tape Q maybe placed over` the joint and cemented to the cover sheet, thereby providing a flush surface for the panel at the joint.- The result is a finished structure which is stable..- rllhe plaster board itself is strong, the edge being protected and reenforced by the protective covering.

What l claim is:

l. A plaster board having a protective edge covering of paper or the like bonded thereto, said covering being fluted with theA ridges and dales extending transversely of the edge of the board. 1

2. A plaster board having a cementitlimlsI bod;7 and protective edge covering of paprr or the like bonded thereto, said covering being corrugated with the ridges' and dales extending transversely of the edge lot the board.` f

3. A plaster board having a cementitious body,` cove-r sheets for the faces thereof` bonded thereto, the edges of said board bc- 'l Iing covered by strips of paper corrugated with the ridges and dales extending transversely ot the edge of the board and bonded thereto.

ln Witness that l claim the foregoing l have hereunto subscribed my name this 27th day ot October, 1925.. 

